Re: db2bak on a provider/master

Mitja Mihelič <mitja.mihelic@xxxxxxxx> · Thu, 26 Feb 2015 15:41:22 +0100



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Mitja Mihelič
ARNES, Tehnološki park 18, p.p. 7, SI-1001 Ljubljana, Slovenia
tel: +386 1 479 8877, fax: +386 1 479 88 78
      On 26. 02. 2015 15:18, Rich Megginson wrote:

    
    On
      02/26/2015 06:30 AM, Mitja Mihelič wrote:
      

      Hi!
        

        We have a provider/consumer (master/slave) setup and we wish to
        create a database backup on the master.
        

        Replica setting on the master are set to "Single Master".
        

        But when I run
        

        .../db2bak $backup_path/$current_date
        

        Backup fails an the following error is written in the errors
        log:
        

        ERROR: Standalone db2bak is not supported when a multimaster
        replication enabled server is coexisting.
        

        Please use db2bak.pl, instead.
        

        Since multimaster replication is not used, should I consider
        this a bug?
        

        Or is it referring to the "Single Master" setup as a multimaster
        setup?
        

      Yes.  "Single Master" is a misleading term as it implies that
      there is some sort of special protocol or setting that prevents
      having multiple masters.  There is no such thing.
      

      What version of 389-ds-base?  rpm -q 389-ds-base.
      

    We are using latest from CentOS repo
    389-ds-base-1.2.11.15-48.el6_6.x86_64.

    There are no such problems with the old
    centos-ds-base-8.2.8-2.el5.centos.

    
    I've browsed the dse.ldif and found the entry defining the
    replication (certain entries omitted):

    dn: cn=replica,cn=dc\3Dcompany\2Cdc\3Dcom,cn=mapping tree,cn=config

    objectClass: nsDS5Replica

    objectClass: top

    nsDS5ReplicaRoot: dc=company,dc=com

    nsDS5ReplicaType: 3

    nsDS5Flags: 1

    nsDS5ReplicaId: 47

    nsds5ReplicaPurgeDelay: 604800

    cn: replica

    ...

    
    I have found the following in the RHDS docs:

    "nsDS5ReplicaType: 3"  - 3 for both single and multi-master
    suppliers (read-write replicas)

    
    From this I would surmise that it does not matter if I choose the
    single- or multimaster, nsDS5ReplicaType is set to 3. And db2bak
    will not work.

    Would this be about right?

    
    Regards, Mitja

    
        Regards, Mitja
        

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